کدامین جمله ترتیب درست دارد؟

Choose the correct order of the words to make a meaningful sentence.

1. Not until he got home he realized did he had lost his keys.
2. Not until he got home did he realize he had lost his keys.
3. Not until did he get home he realized he had lost his keys.
4. Not until he did get home he realized he had lost his keys.